EXternal HDD

Helo @goch

What do you mean by “clean”? → trim?

Note: regarding Optimize → Norton calls Windows

Does Windows recognize your external Free Agent HDD?
Just use Windows → Optimize Drives

https://support.microsoft.com/en-us/windows/defragment-optimize-your-data-drives-in-windows-54d4fed1-c96e-46db-b843-8c6b34bd27a4

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Note: my external Seagate (G:) = Unsupported drive